computers = int(input())
total_rating = 0
total_sales = 0
sale = 0

for i in range(computers):
    num = int(input())

    rating = num % 10
    possible_sales = (num - rating) / 10
    total_rating += rating

    if rating == 3:
        sale = possible_sales * 0.50
    elif rating == 4:
        sale = possible_sales * 0.70
    elif rating == 5:
        sale = possible_sales * 0.85
    elif rating == 6:
        sale = possible_sales * 1
    else:
        sale = 0

    total_sales += sale

print(f"{total_sales:.2f}")
print(f"{(total_rating/computers):.2f}")